Coating machine



Feb. 9 1926. 1,572,205

D. E. HARDING COATING MACHINE Filed April 11, 1922 //Vl/NTO/? Dana E. Hard/71y By W v VLAL if):

Patented Feb. 9, 1926.

UNITED STATES. PATENT, OFFICE.

DANA E. HABDINC, OI DANVERS, MASSACHUSETTS, ABSIGNOR TO HARDING ENGI- NE-ERING COMPANY, OF EAST BOSTON, MASSACHUSETTS, A CORPORATION 01' MASSACHUSETTS.

COATING Application filed April 11, 1928. Serial No. 551,782:

To all whom it may concern Be it known that I, DANA E. HARDING, a citizen of the United States, residing at Danvers, in the county of Essex and State of Massachusetts, have invented new and useful Improvements in Coating Machines, of which the following is a specification.

The present invention relates to applying liquid to traveling surfaces. It is applicable to many specific uses, including that of spreading dye or igment on skins and leather, painting clot h, boards, and any other articles capable of being transported under a delivering tank or being so held that a painting machine may be passed over it, and in general for any use where it is desired to spread aliquid evenly over a wide surface.

The particular ob'ect of the invention is to provide means or delivering the dye, pigment, paint or other coatin liquid from a tank, regulating its rate of ow, and (llS tributing the liquid evenly over the whole extent of the surface to be coated. These objects are accomplished by the means which form the subject of the present invention and are described in the following specification in connection with a practical constru'ction of coatin machine illustrated in the accompanying rawings.

While my present invention is of general use as above noted, it is of particular value in seasoning leather for various purposes, such for example as applying color to hides, skins, leather or the like, supplyin a coating for finishing, or preparatory for glazing, or for softening and treating and to this end the apparatus herein shown may be utilized in connection with an enclosing oven or other heat retaining apparatus. The control of the opening for the flow of liquid to the applying brus regulating the supply is an important feature, this being capable of use during the operation of the machine, and without stoppin the apparatus.

Referring to file draw1ngs,

Figure 1 is an elevationof a coating machine in connection with which the invention is used.

Figure 2 is an enlarged sectional view of the liquid delivering and spreadin means.

Figure 3 is asectlonal view of t e regulating supply valve; 4 a 4 Like reference characters designate the same parts in all the figures wherever they occur.

In Figure 1 a represents frame which supports a roll I; over which a conveyer 0 passes. The conveyer also passes around another roll (not shown) by which it is held, in a sufiiclently stretched condition, and by,

one or both of which it is propelled. 0! represents a standard rising from the frame which supports a tank or trough e containing the dye, solution of pigment, paint or ot er coating material.

Referring now particularly to 'Figures2 and 3, the tank e is equipped at its lowest I point with a valve chamber f having a lar e number of ducts or passages g arranged si e by side and opening through the bottom of the tank at one end and from the valvecham her at the other end. The tank and the" valve casing have a length preferably as great as the width of the conveyer c and at least as great as the width of'the articles to be coate or of the portions of such articles to which the coating is'to be applied. The ducts are spaced e ually or approximatel so throughout the? delivered. I

A valve body or cock It occupies a chamber in the valve casing and crosses the ducts g. This valve and the chamber which it occupies are preferably complementally cylindrical, so that the valve body may berotated. It is within my contemplation, however, that the valve be mounted non-rotatably, and that. it may be moved endwise so as to open or In the valve body are passages Z spaced equally with the casing and adapte or out of register with the latter passages to a greater or less extent b the described movement of the valve. nstead of these (passages g of the valve passages I being made as transverse holes through the valve body, they may be made as slots cut part way through the valve from one side, or the whole side of the valve may be cut away continuously throughout so much of its length as lies in the region of the passages g. However the valve may be made in detail, in principle it is so conength of the valve in or er to effect a distribution of the liqui to be placed in register I structed that it may n or close all of the outlet passages from t e tank either wholly or in part, and so open or close all of them equally at the same time. To the side of the valve casing f is secured a brush head or holder m whlch carries bristles 0 so closely distributed throughout its length and otherwise so disposed that their ends bear on the conveyer and upon whatever flat articles may be carried by the conveyer. This brush crosses the outlets of the several passages 9, whereby the discharge of liquid from these passages occurs first on the brush and the liquid does not reach the article being coated until it has flowed over and between the brush bristles. In thus flowin over the bristles, the liquid is thorough y distributed and when it passes from the end of the latter to the traveling surface beneath, it is uniformly distributed over that surface.

Other elements of the machine include a roll 19 arranged directly under that part of i the conveyer which lies under the brush and other rolls 9- and .1' arranged over the conveyer adjacent to the brush. The roll p will be carried by the conve er under and sup orts the conveyer and holds its upper' sur ace at an invariable distance from the supply tank, while the rolls g and'r serve to flatten out the articles being coated, in

case they are of flexible material and liable in contact with the brush an from the latter will receive an equally distributed coating of the liquid. The rate-of flow of the liquid, of course, is regulated by adjustment of the valve k in accordance with the viscosity of the liquid and the rate of travel of the conveyer, so that a sufiicient a ount of liquid will be delivered to coat the traveling surface uniformly and without excess.

What I claim and desire to secure by Letters Patent is:

1. A liquid supplying means for coating apparatus comprising a tank having a series of discharge outlets, valve means controllin said outlets in unison, and a brush arranged to receive thematerial delivered from said outlets and to distribute such material over the surface being coated, in combination with work supporting means substantially in alinement with saidbrush.

2. A liquid coating apparatus, comprisin a source of liquid supply, an applying bru of substantial width, a plurality of conduits from the supply to the face of said brush, in combination with a valve having a corresponding number of conduits therethro'ugh to re 'ster with and control the passage of liqui from the supply to the brush, and means to actuate said valve.

3. A liquid supplying means for coating apparatus having, in combination, a tank, a series of discharge elements arrangedparallel to each other and lying in substantially the same plane, a valve controlling said discharge outlets simultaneously, a brush associated with the discharge outlets and adapted to receive liquid therefrom at a plurality of points within the interior of the rush, and work supporting and feeding means normally in engagement with the brush and movable transversely thereof.

In testimony whereof I have aflixed my signature.

DANA E. HARDING. 

